83 lines
2.3 KiB
Python
83 lines
2.3 KiB
Python
# pyRCV2: Preferential vote counting
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# Copyright © 2020–2021 Lee Yingtong Li (RunasSudo)
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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from pyRCV2.numbers.base import BaseNum, compatible_types
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Big.DP = 6
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def _fixed_set_dps(dps):
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Big.DP = dps
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class Fixed(BaseNum):
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"""
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Wrapper for big.js (fixed-point arithmetic)
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"""
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@classmethod
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def _to_impl(cls, value):
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"""Implements BaseNum._to_impl"""
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return Big(value).round(Big.DP)
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def pp(self, dp):
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"""Implements BaseNum.pp"""
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return self.impl.toFixed(dp)
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@classmethod
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def _add_impl(cls, i1, i2):
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"""Implements BaseNum._add_impl"""
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return i1.plus(i2)
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@classmethod
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def _sub_impl(cls, i1, i2):
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"""Implements BaseNum._sub_impl"""
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return i1.minus(i2)
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@classmethod
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def _mul_impl(cls, i1, i2):
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"""Implements BaseNum._mul_impl"""
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return i1.times(i2)
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@classmethod
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def _truediv_impl(cls, i1, i2):
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"""Implements BaseNum._truediv_impl"""
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return i1.div(i2)
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@compatible_types
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def __eq__(self, other):
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"""Implements BaseNum.__eq__"""
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return self.impl.eq(other.impl)
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@compatible_types
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def __gt__(self, other):
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"""Implements BaseNum.__gt__"""
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return self.impl.gt(other.impl)
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@compatible_types
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def __ge__(self, other):
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"""Implements BaseNum.__ge__"""
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return self.impl.gte(other.impl)
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@compatible_types
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def __lt__(self, other):
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"""Implements BaseNum.__lt__"""
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return self.impl.lt(other.impl)
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@compatible_types
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def __le__(self, other):
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"""Implements BaseNum.__le__"""
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return self.impl.lte(other.impl)
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def __pow__(self, power):
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"""Implements BaseNum.__pow__"""
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return Fixed._from_impl(self.impl.pow(power))
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def round(self, dps, mode):
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"""Implements BaseNum.round"""
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return Fixed._from_impl(self.impl.round(dps, mode))
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